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A recreational marijuana menu and price list sits on a counter at 3D Cannabis Center, which opened as a legal recreational retail outlet in Denver, early Wednesday, Jan. 1, 2014. Colorado began retail marijuana sales on Jan. 1, a day some are calling "Green Wednesday." (AP Photo/Brennan Linsley)

A recreational marijuana menu and price list sits on a counter at 3D Cannabis Center, which opened as a legal recreational retail outlet in Denver, early Wednesday, Jan. 1, 2014. Colorado began retail marijuana sales on Jan. 1, a day some are calling "Green Wednesday." (AP Photo/Brennan Linsley)